Blowers are designed to transfer fresh air from outside the boat into poorly ventilated spaces, displacing fumes and odours from galleys and toilet compartments, and fuel vapours from engine compartments.

Blowers can also be used as extractor fans, drawing out fumes so that fresh air is drawn in.

In either case, make sure that the space to be ventilated can 'breathe', or the blower will be ineffective.

Flexmount Blower (below) uses a mounting bracket

Flangemount blower (below) mounts from a flange on the discharge port

In-line blower (below) is mounted directly into the air conduit, with no change of direction